Part of body of potentially mean bod (7)
I believe the answer is:
abdomen
'part of body' is the definition.
('abdomen' is part of 'body')
'potentially mean bod' is the wordplay.
'potentially' indicates an anagram (letters have the potential to spell a new word).
'mean'+'bod'='meanbod'
'meanbod' with letters rearranged gives 'ABDOMEN'.
'of' acts as a link.
(Other definitions for abdomen that I've seen before include "Midriff" , "A main part of the body" , "Region of the body between the thorax and pelvis" , "pot" , "Central part of the body" .)